“You twa are no wice.”
no wice: mad, insane, not in one’s right mind.
“You two are out of your minds.”
Quite often used as a description and indication of disbelief and dismay when one or more people do something that is foolish and even dangerous in terms of risk. And which they know themselves is a risk and is making them look foolish. Essentially it describes ‘show off’s’ doing something idiotic.